PLANT GROWTH PROMOTING RHIZOBACTERIA ISOLATED FROM Solanum tuberosum L. IN VERACRUZ-MÉXICO RIZOBACTERIAS

Abstract

Background: The central area of the state of Veracruz is widely known as one of the regions with the largest hectares dedicated to the production of potato (Solanum tuberosum L.), this is susceptible to different diseases, an strategy of managements is with applications of growth-promoting rhizobacteria that have yielded favorable results in other crops.Objective: To evaluated seven bacterial strains isolated from the rhizosphere of Solanum tuberosum in terms of plant growth promotion (PGPR). Methodology: The isolates belonged to the species: Providencia alcalifaciens, Pseudomonas syringae pv syringae, Serratia marcescens, Serratia liquefaciens (I), Serratia liquefaciens (II), Pseudomonas putida and Serratia ficaria. Biochemical tests were performed such as production of siderophores, solubilization of phosphate, production of indole-3-acetic acid and nitrogen fixation. Results: All the bacterial strains functioned as plant growth promoters, compared to the negative control, particularly the P. syringae pv syringae and S. liquefaciens (I) strains. Implications: The use of these strains represent an alternative to improve the phytosanitary conditions of this crop for the area. Conclusion: Based on the above, we consider that the seven bacterial strains evaluated in this study constitute a promising and environmentally friendly strategy in development of potato crop of Perote Veracruz.